Conclusions
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1.
It has been shown by the studies reported herein that methods such as total base number, DSP (dispersingstabilizing properties), and transparency of oil-naphtha mixtures, when used to evaluate additive exhaustion, give noncomparable results in a significant number of cases.
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2.
The proposed direct method of determining additive exhaustion by photomicrography gives an additional possibility for a direct rating of the dispersant effectiveness of an additive.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 10, pp. 52–55, October, 1967.
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Ventsel', S.V., Tolmacheva, A.G. Investigation of lube oil additive exhaustion by photomicrography. Chem Technol Fuels Oils 3, 744–747 (1967). https://doi.org/10.1007/BF00776389
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DOI: https://doi.org/10.1007/BF00776389